Analysis of the Requirements for Metrological Support of Methods and Means of Ultrasound Control

Establishing requirements for acoustic measurements and calibration blocks and monitoring their implementation during production and certification is an important task. In this paper, the parameters affecting the propagation velocity of elastic waves in steel are considered, and their contribution to the total uncertainty of measuring the propagation velocity of a longitudinal wave is determined. Based on the data obtained, an analysis of the standards devoted to ultrasonic testing methods was carried out in terms of the requirements for calibration blocks. The conducted research allowed us to establish that the requirements imposed by the current standards do not sufficiently take into account a number of factors that may affect the characteristics of ultrasound measures and reference samples. Standard samples made without taking these factors into account are unlikely to adequately assess the metrological characteristics of ultrasound equipment.